Thousands gathered on Thursday night to remember a police officer, ex-soldier and father of two who was one of 58 people killed by the Las Vegas shooter on Sunday.

Charleston Hartfield, an 11-year veteran of the Las Vegas Metropolitan PD and father to a 15-year-old son and nine-year-old daughter, was on his annual visit to the Route 91 Harvest country music festival when Stephen Paddock opened fire on the 22,000 people in attendance.

Photos from his Instagram and Facebook feeds show him and his wife, Veronica, pulling funny faces in selfies just hours before chaos broke out.

In that moment, Undersheriff Kevin McMahill said, Hartfield - who had also put in 16 years of active military service - went into action to save lives, giving up his his own in the process.

Veronica, their son Ayzayah, 15, and their daughter Savannah, 9, all wept - as did several of Hartfield's colleagues - during the ceremony, which was held at the city's Police Memorial Park.

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The wife and son of a police officer slain in Sunday's mass shooting are seen here on Thursday night at a memorial service. Charleston Hartfield was off-duty when he was killed; pictured are Veronica and 15-year-old Ayzayah

Hartfield's colleagues salute while 'Taps' is played during a vigil for the murdered officer at Police Memorial Park. He was off-duty at the Route 91 Harvest country music festival when Stephen Paddock, 64, opened fire on the crowd, killing 58

Hartfield (pictured left, and right taking a selfie at the festival) was an 11-year veteran of the police force, and was in the Army for 16 years. He described himself as someone 'committed to bridging the gap with no filters or shaded perceptions'

Sgt. Ryan Fryman, who was on the scene of the shooting on Sunday night, hugs a fellow officer at the end of the vigil. Earlier in the week it had been announced that Hartfield had been saving lives when he himself was shot

As thousands gathered to pay respect to Hartfield, some said how he changed their lives; at one point, it was revealed, he threw a homecoming party for a family friend's daughter, who had been too sick with chemotherapy to go to her high school

Las Vegas Sheriff Joseph Lombardo (fourth from left) is seen among the crowds remembering Hartfield on Thursday

The father-of-two was a 'very special, beautiful man,' and his death was 'a very special loss,' Las Vegas Mayor Carolyn Goodman (pictured left) said after the vigil. Hartfield's children are seen right

The father-of-two was a 'very special, beautiful man,' and his death was 'a very special loss,' Las Vegas Mayor Carolyn Goodman told the Las Vegas Review-Journal after the vigil.

Among those at the event were Las Vegas Sheriff Joseph Lombardo, members of the US Army, and dozens of police officers, some of whom visibly wept during the ceremony.

But the event was led by Hartfield's wife, son and daughter. They walked in a procession - joined by police officers and Army soldiers - before joining the crowds in prayer for Hartfield.

The slain officer - who in July published a book titled Memoirs of a Public Servant, now a number-one seller on Amazon - was remembered as the sun fell on the crowds, and thousands of candles began to glow in the dusk.

'He was just a great individual, a positive individual,' said Troy Rhett, a longtime family friend, according to NBC News.

'He was dependable. You meet certain people in life who are all of those things and that's who Charles was for the community. He was the best of what we had all wrapped into one.'

One story told at the event was how Hartfield had made a homecoming party for a family friend's niece, who was too sick with chemotherapy treatments to attend her own high school event.

He also took her to his barber to get a haircut when she started losing hair.

'The healing process may take a long time but I know it’s something that we can start, and hopefully his family will be able to rebound from this,' Rhett said.

Hartfield's widow, Veronica, and their son, Ayzayah, are seen walking to the venue, accompanied by police and soldiers. Hartfield 'epitomizes everything good about America,' Brig. Gen. Zachary Doser of the Nevada Army National Guard said

Denita Hartfield (left) joins Veronica, Ayzayah and Savannah in prayer at the memorial service. Hartfield was remembered as a steadfast friend, a courageous public servant and a loving father

Las Vegas police officer Jonathon Ghebrecristos, second from right, cries during the beginning hours of the candlelight vigil. Hartfield died protecting innocents, Undersheriff Kevin McMahill said

Las Vegas police Sgt. Chris Dennis, right, wipes his eyes during the vigil. Hartfield was 'just a great individual, a positive individual,' said Troy Rhett, a longtime family friend

Nathan Ehlers (left), seven, and his eight-year-old brother Charlie Ehlers attend the candlelight memorial. Stan King, whose son was coached in football by Hartfield called him 'seriously one of the nicest guys ever,' and 'a true-blue American'

Thousands continued to remember Hartfield as night fell on Los Angeles

Rhett told the Las Vegas Review-Journal that he'd texted Hartfield as soon as he heard about the shots, knowing that his friend of eight years was on the scene.

'I figured he was probably busy helping others,' he said. 'I don't know a better man than Charles. They say it's always the good ones we lose early. There’s no truer statement than that with Charles. … Our hearts have just been very heavy since hearing the news.'

As well as his work as a cop, Hartfield - also known as Charles, Chucky or 'ChuckyHart,' - coached youth football.

Among the children he coached was the son of Stan King, who called Hartfield 'seriously one of the nicest guys ever,' and 'a true-blue American.'

Hartfield had also helped design a wall to remember four officers who died on duty in 2010, saying that he 'thought it was important that [their sacrifice] was remembered.'

Speaking on Tuesday, a visibly emotional Undersheriff McMahill said in a news conference that 'Even though Officer Hartfield was at the concert as a civilian, he immediately took action to save lives.In that moment, he was acting as a police officer. He ultimately gave his life protecting others.'

Hartfield was a sergeant 1st class in the Nevada Army National Guard, and was assigned to the 100th Quartermaster Company, which is based in Las Vegas.

Brig. Gen. Zachary Doser, commander of the Nevada Army National Guard, told the Review-Journal that 'Sgt. 1st Class Hartfield epitomizes everything good about America.'

In his author description on Amazon, Hartfield described himself as 'A public servant from the early age of 18 who is committed to bridging the gap with no filters or shaded perceptions.'

LVMPD Sgt. Chris Dennis speaks during Hartfield's vigil on Thursday. In 2010 Hartfield designed a memorial wall for four slain officers, saying he 'thought it was important that [their sacrifice] was remembered'

Las Vegas police Sgt. Ryan Fryman, right, and other officers pay their respects at the memorial. 'I don't know a better man than Charles,' Rhett said. 'They say it's always the good ones we lose early. There’s no truer statement than that with Charles'

Members of the community - including a Buddhist Monk (third from left) gathered at the memorial service, which fell four days after the bloodshed on the Strip

Flowers adorn chairs before the candlelight memorial, which was attended by thousands on Thursday

Hartfield (left) was a sergeant 1st class in the Nevada Army National Guard. His family are seen right remembering their much-loved patriarch at the vigil

As Thursday wound on, the last two victims of the shooting were revealed.

The first of them was Brett Schwanbeck, 61, of Bullhead City, Arizona, who was an avid outdoorsman and 'the funniest guy in the world to be around,' Shawn Schwanbeck told The Las Vegas Review-Journal.

'He liked to be where no one else was at. He liked to get lost out in the middle of the woods,' Schwanbeck said, recalling the time that a bear walked through their campsite one time in Colorado.

'That was one of the coolest experiences of my childhood,' he said.

Colorado wasn't the only place Schwanbeck took his family; they also went hunting, hiking, fishing and exploring in Florida, Mississippi, Arkansas and California.

Schwanbeck died of a head wound on Tuesday after being shot in Sunday's bloodbath, his niece Carla Van Hoosen said. He had been at the music festival with his fiancee, Anna Orozco, who was not harmed. A GoFundMe has been set up in his name.

Van Hoosen said he was the most memorable and fun of her uncles and aunts, of whom she has more than a dozen - and that he would always go out of his way to help, even if it meant 'driving 500 miles'.

One, she said, she found herself stuck at a family gathering because one of her SUV's headlamps broke - so Schwanbeck grabbed his tools, took off the bumper and got to work.

'He was out there for hours fixing it,' she said. 'He kept saying 'This is why you don’t buy a Chevy."'

Brett Schwanbeck, 61, of Bullhead City, Arizona, was one of the last two murder victims to be named. An outdoorsman with a great sense of humor according to his family, he died on Tuesday. He was hit in the head while at the music festival with his fiancee, who was unharmed

The final victim to be named was Austin Meyer of Marina, California. A huge fan of Bobby Bones and the Raging Idiots, one of the acts at the festival, he was attending as a surprise for his 24th birthday, and to celebrate his anniversary with his girlfriend, Dana.

His sister, Veronica, described him as 'Ambitious, smart, and hard working' to KSBW.

'Austin was a joy to be around,' she said. 'He always had a smile on his face, was [witty] and was always making people laugh.

'He was passionate about cars, loved sports, basketball in particular, and his favorite team [was] the Boston Celtics.'

Meyer had worked as a driver for Main Event Transportation in Monterey while living in Marina, but had recently quit his job and moved to Reno to attend Truckee Meadows Community College.

There, he was earning a degree in Transportation Technologies in the hope of opening his own auto repair shop after graduation.

'He was excited to get married and start a family,' Veronica said. 'He was very well loved by his coworkers and was looking forward to returning upon graduation,' she added.

The final murder victim to be named was Austin Meyer of Marina, California. He was celebrating his 24th birthday and his upcoming anniversary with his girlfriend, Dana, when he was shot

These are the faces of all 58 people who were killed when Stephen Paddock opened fire on the Route 91 Harvest country music festival in Las Vegas on Sunday; 489 were injured. Paddock later shot himself dead

Earlier on Thursday, it emerged that Paddock's girlfriend told the FBI that prior to the shooting, he had developed 'mental health symptoms' and would scream at night, it has emerged.

Marilou Danley, 62, said Paddock, 64, 'would lie in bed, just moaning and screaming, "Oh my God,"' according to an ex-FBI official briefed on the situation.

Investigators - who interviewed Danley after she arrived back in the US from the Philippines on Tuesday night - believe that he may have been in 'mental or physical anguish,' that official and another ex-FBI source told NBC News.

However, they said that detectives are still no closer to determining Paddock's motive for the deranged shooting spree that saw him killing 59 people, including himself, and injuring 489 others.

Las Vegas mass killer Stephen Paddock (left) would scream in the night, his girlfriend, Marylou Danley (right, with Paddock) told the FBI. She said he'd had 'mental health symptoms'. FBI say he could have been in 'mental or physical anguish'

Danley has been speaking to the FBI since she was pictured here arriving at LAX on Tuesday night. Investigators don't think that Paddock's mental health had deteriorated to the point that it would have factored into his mass murder, however

Danley and Paddock had shared this home in Mesquite (pictured Wednesday; garage door was removed by police when it was raided Monday), and also lived together at other properties he had owned in Nevada and Florida

Paddock's hotel room was filled with guns, many with bump-stocks that would allow for automatic rates of fire. This was the scene after cops busted open his door to find him dead. He killed 58 people and wounded 489 others at Sunday's festival

Danley said in a written read out by her lawyer on Wednesday that she had no idea of Paddock's plans. The lawyer refused to answer questions - including whether she was aware of the 49 guns Paddock had secreted in multiple properties

While Danley's remarks suggest that Paddock was not well, investigators do not believe that his mind had deteriorated enough to set up and execute his elaborate mass-murder plan, which saw him firing on a crowd of 22,000 people at a country music festival.

Other areas now under investigation are the hour-long gap between 10:15pm, when Paddock unloaded more than 200 rounds into the hall outside his room, wounding a security guard, and 11:20pm, when police breached the room and found Paddock dead on the floor.

Paddock did not fire at all during that time. It was suggested by Las Vegas Sheriff Joseph Lombardo that he may have been trying to devise a way to escape.

WHY DID THE INJURY COUNT DROP?

On Wednesday the number of people injured in Paddock's shooting fell from 527 to 489.

In a press conference, Sheriff Lombardo said that the initial numbers were composed of figures given by local hospitals during the crisis.

They accidentally included some people who were counted twice and others who were treated for injuries not linked to the shooting, he said.

The new figure is the new official statistic, he said.

At around 10pm Thursday, Valley Health System announced that eight victims were still in critical condition at its hospitals following the shooting. Valley Health system has six hospitals in Las Vegas and Nevada.

That was an improvement on Wednesday, when 58 were still in critical condition, according to the Las Vegas Review-Journal.

Also on Thursday, police revealed that Paddock's Hyundai Tuscon, license plate 114B40, which had been hunted after the attack, was found when a search warrant was executed on his house in Reno.

The count of injured people has been lowered from 527 to 489, Sheriff Joseph Lombardo said on Wednesday. The initial figure was accidentally inflated by hospitals in the confusion.

In a statement read out by her lawyer yesterday, Danley said she knew Paddock as a 'gentle' and 'quiet' man whom she loved and hoped to live a quiet life with.

She also said she had been oblivious to the violence he had been meticulously planning, and that she was out of the country during the attack because he'd bought her a surprise ticket to the Philippines - so, he said, she could visit her family.

Danley claimed that when he wired her $100,000 - ostensibly for her to buy a house for her family - she assumed that he was breaking up with her. She said she had no idea that he was planning violence.

On Thursday, Danley's brother in the Philippines, Reynaldo Bustos, 75, said that she had told him over the phone that her conscience 'is clear' over the killings.

On Thursday the number of critically injured patients in the Valley Health System hospitals fell to eight, from 58 on Wednesday. Valley Health system has six hospitals in Las Vegas and Nevada

Danley (left) told investigators that Paddock had bought her a ticket to the Philippines prior to the attack and told her to visit family there. While there she spent time with her brother, Reynaldo Bustos (right), at his home in Dasmarinas

In his native Tagalog, Bustos told ABC: 'I called her up immediately and she said, 'Relax, we shouldn't worry about it. I'll fix it. Do not panic. I have a clean conscience. I didn't have anything to do with this.'

Bustos and his family live in Village Park, an area where middle-class Filipino families' homes are built on lots which cost around $6,000. Danley arrived bearing gifts.

MARILOU DANLEY'S WHEREABOUTS IN THE DAYS BEFORE THE SHOOTING

September 15: Danley arrives in the Philippines from Tokyo

September 22: Danley leaves the Philippines for Hong Kong

September 25: Danley returns to the Philippines from Hong Kong

October 3: Danley cuts her trip to the Philippines short to return to the US to speak with investigators

October 4: FBI says Danley isn't in their custody but won't disclose her location

Bustos practices hilot, an ancient Filipino art of healing, and herbal medicine. He was not at home on Thursday and was treating a patient in Pampanga province, according to local sources.

He shares his home with his son Miguel and daughter-in-law Marizalyn Joy Bustos Waniwan. Along with Bustos' work as a faith healer, the family sells duck eggs and smoked fish.

'I saw a nice car parked on the street,' one neighbor told DailyMail.com. 'The next-door neighbor told me that it was Marilou.'

Danley is an Australian citizen who had renounced her Filipino citizenship, according to a local report by ABS-CBN. It is also not known precisely when she immigrated to Australia.

Her immigration status in the US has not been officially disclosed, but she married Geary Danley in 1990, and is likely to have qualified for a green card shortly after that.

A local told DailyMail.com that another of Danley's sisters, Dolly, owned land in a subdivision called Green Breeze.

Dolly is believed to live at a gated community, around 12 miles away, where homes start at around 3 million Philippine pesos or $60,000.

Danley visited Bustos' home; he says she told him after the Sunday killings that her conscience is 'clear'. Paddock had sent Danley $100,000 while she was there and told her to buy a house for her family, she claims; a lot costs around $6,000

Marilou Danley (second right) is from a large family which includes her sisters Liza Werner (center) and Amelia Manango (right), both of whom live in Australia - as did she until marrying an American man, Geary Danley, in 1990. Danley said she thought after receiving the money that he was planning to break up with her

As well as speaking to Danley, investigators are also looking at 'six media devices' left behind by Paddock, and also exploring his web browsing history.

His web history also led to the discovery, announced Thursday, that he had apparently been scoping out other major events over the past year.

In August he booked a hotel room overlooking Lollapalooza in Chicago - the massively popular rock event that saw appearances by The Killers, Chance the Rapper and Muse, and that was visited by Malia Obama.

According to TMZ, Paddock - who lived in Nevada, 90 minutes from Las Vegas - booked two rooms at the Blackstone Hotel, overlooking Grant Park, where Lollapalooza has been held since 2005.

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He made the booking using Expedia and insisted on a 'view room' that would overlook the festival, which ran on August 3-6, and also demanded he be notified in advance if such a room was unavailable.

However, officials said that he did not show up to the hotel for the booking.

He also researched possible locations in Boston online, according to multiple reports.

Anonymous officials said that Paddock looked for hotels near Fenway Park, where the Red Sox play and the Boston Center for the Arts.

It was not known if the gunman went as far as making any reservations, but an officer speaking to NBC News under condition of anonymity said that no hotels give a view over the park.

It also emerged Thursday that Paddock had rented two rooms at the Blackstone Hotel (left) in Chicago on August 3-6 - in time for the Lollapalooza festival. Seen right is the festival from the Blackstone. Cops said he never turned to to the booking

This view shows show Paddock would have had an excellent vantage point over the festival - and could theoretically have opened fire on festivalgoers. Chillingly, his hotel aligns almost perfectly with the Children's Stage

'We are aware of the media reports and have been in communication with our federal partners,' a spokesman for the Chicago Police Department said.

'As you saw earlier this week the city conducts extensive public safety planning and training around major events, in close coordination with our law enforcement partners, to ensure public safety.'

KILLER 'REQUESTED FESTIVAL VIEW - AND GOT HIS ROOM FREE'

Paddock had specifically requested a suit overlooking the music festival he later attacked.

He made the request - naming the festival - when he checked in on Thursday September 28, a source told The Associated Press.

However, the room wasn't immediately available, the source said, and he was put in another room.

Because of that, when the suite opened up on Saturday, the hotel gave it to him for free, the source claimed.

The following night, he knocked through two windows in the two-room suit and opened fire on the festival.

It was confirmed by Lombardo yesterday that Paddock had also hired out a condo overlooking another Las Vegas festival, Life is Beautiful, which ran on September 22-24.

Depending on its precise position and elevation, the condo, which he booked on Airbnb, could have allowed him to open fire on the main stage, as well as several blocks of the 15-block festival.

There are also reports that he had attempted to book a room at the El Cortez hotel next to the Ogden, although they have not been substantiated.

It's unclear whether he had intended to attack that event, and if so why he had not done so.

Coincidentally, performers at Life is Beautiful included Muse and Chance the Rapper, who both played the main stage - and were also at Lollapalooza.

As the investigation into Sunday's shocking events moved into its fourth day, more details emerged about Paddock's final days - including his heavy gambling, 'creepy staring' and complaints about noise at the Mandalay Bay Resort the night before his massacre.

On Saturday night - the evening before he fired on the Route 91 Harvest country music festival - Paddock called in two noise complaints about loud country music being played in room 31-135, directly below him.

In the room was Albert Garzon of San Diego, who was in town for the festival with his wife and some friends.

On Thursday it emerged that the night before his spree, Paddock complained about noise from Albert Garzon in the room below. Garzon said he didn't realize the complaint came from the killer until he saw curtains hanging from broken windows

It also emerged that Paddock would spend as much as $100,000 an hour in eight-hour stints on high-stakes video poker machines such as these. His hands would move so fast he was like a 'stenographer,' one person who knew him said

Garzon said that he'd received a knock on his door at around 1:30am, and a member of security told him to turn down the music because the guest in the room above had complained about the noise, the New York Times reports.

Garzon turned down the music, but it wasn't enough - at 2am a different security guard said there had been another complaint, and so he turned the music off altogether.

It was only when he saw the curtains flapping through the smashed windows above on Monday that he realized he had been sleeping underneath Paddock's arsenal.

Other stories began to filter in from those who had encountered Paddock - particularly in the casinos, where some said he would play $125 hands of video poker so fast his fingers looked like a stenographer's.

John Weinreich, was an executive casino host at the Atlantis Casino Resort Spa in Reno, where Paddock went so often that - according to his brother Eric - the whole Paddock family would be given the top floor to enjoy.

Weinreich said Paddock was a 'starer' who could make other players uncomfortable.

'He loved to stare at other people playing,' he said. 'It was not a good thing because it would make other VIPs in the high-limit area uncomfortable.'

'One of my guests once said to me, "He really gives me the creeps."'

Paddock was such an avid player of video poker he would play up to 1,000 hands an hour for eight hours straight - potentially spending as much as $800,000 in a day.

Paddock would play as many as 1,000 $125 hands an hour, for eight hours straight. One ex-casino worker said that Paddock would stare at people, which would creep out other players

DailyMailTV also learned that despite having millions to his name, the former accountant was so concerned about saving money that he often ate lunch at a retirees' center.

He joined the frail, elderly, homeless and disabled at the Mesquite Community and Senior Center in Nevada paying just $3.50 for a subsidized lunch.

Around three times a week Paddock enjoyed Mexican food, meatloaf and hamburgers while listening to cheery songs on the piano at the center.

But in contrast to the convivial surroundings, Paddock was an 'unsociable' and 'quiet' man who liked to sit alone to eat his lunch and who was 'in a world of his own,' other diners said.

And bizarrely, on the day Paddock drove 80 miles to Las Vegas to begin preparations for his death mission at Mandalay Bay, he popped into the government-run center to ask the cook for a recipe.

Local resident Marshall Meland, 78, told DailyMailTV that Paddock was in the center last Thursday morning but didn't stop for lunch.

'Instead he went straight up to the counter to speak with the cook and asked her about an enchiladas dish she cooks, he wanted to know how she made it,' Meland said.

'After that he left. No one took any notice of him. It wasn't until later after what he did that we realized he drove to Vegas that afternoon. Everyone at the center is shocked.'

That shock isn't just felt by those in Nevada, however; as far away as New York, police are now putting into place plans to avoid another attack, while the White House has suggested it might support regulation on 'bump-stocks,' the modifications that enabled Paddock to fire a semi-auto rifle like it was automatic.

Counselor to the President Kellyanne Conway said Thursday that the White House, like Hill Republicans, 'welcome thoughtful conversations' on gun control matters - suggesting the White House might be comfortable with regulating bump-stocks

'Bump stocks' are legal and originally were intended to help people with limited hand mobility fire a semi-automatic without the individual trigger pulls required. They allow semi-automatic rifles to fire up to 800 rounds a minute, like a full-auto gun

The possibility of the Trump administration restricting access to bump-stock modifications was raised by Kellyanne Conway in an appearance on Fox News & Friends on Thursday.

She pointed to Republicans such as House Speaker Paul Ryan, R-Wis., and House Judiciary Committee Chairman Robert Goodlatte, R-Va., who both said the same day that they will consider regulating the device.

'Many of them are open to a conversation, we always welcome thoughtful conversations,' Conway said, indicating the White House could give such a ban a blessing - a highly unusual step for a Republican administration.

Her thoughts - and phrasing - were redolent of remarks made by White House Press Secretary Sarah Huckabee Sanders, who told reporters: 'Members of both parties and multiple organizations are planning to take a look at bump stocks. We welcome that and would like to be part of that conversation.'

HOW DO BUMP-STOCK MODS WORK?

Bump-stock modifications, which allow for full-auto fire on semi-auto guns, were found on 12 of the 23 rifles found in Paddock's hotel room.

They're believed to be how he was able to fire thousands of rounds into the crowds at a music festival on Sunday in just 10 minutes.

They are attached to the rear of the gun and allow the rifle to slide back and forward while firing, causing the trigger to 'bump' into the shooter's finger with the natural recoil of each shot.

So long as the shooter keeps his or her finger over the trigger, the semi-automatic gun will keep firing rapidly - much like a full-automatic.

Instead of pulling the trigger with their finger, users tense the finger, then pull the gun forward with their other arm, which would usually steady the gun.

While the stock and pistol grip remain still, the rest of the gun moves forward, pulling the trigger onto the finger to fire a shot.

The recoil then sends the gun back on the slide and the trigger away from the trigger finger.

Continuing to pull the gun forward with the steady-arm causes the gun to jolt back and forth, repeatedly depressing the trigger and firing as many as 800 rounds per minute.

However, Conway - always eager to stick the boot into Democrats - added: 'I would just note for the viewers, that since bump stock has not been in the lexicon before, this is a device that President Obama's ATF decided would not be regulated in 2010 and I think that's an important part of this conversation.'

Conway tried the same lines on Chris Cuomo, host of CNN's New Day but this time got short shrift, as he told her 'a lot of this doesn't wash.'

'All you need to know about bump stock is that it was legal, and that's what allowed him to lay down that field of fire. That's all you need to know about it.'

'There's no thoughtful conversation to have about it. Of course it was 2010. Of course it was the Obama administration,' he added, pointing out that bump stocks are a relatively new technology. 'I'm saying don't cheapen what happened in Las Vegas.'

The comments in favor of regulating the stocks made by Ryan and Goodlatte on Thursday follow those made by their GOP brethren, Sen. John Thune, R-S.D.; Sen. Lindsey Graham, R-S.C.; Sen. Ron Johnson, R-Wis; and Rep. Bill Flores, R-Tx.

Thune, the third-ranking Republican in Congress, said that bump-stock legislation was 'something I think we'll look at;' Graham said it was a 'good time' for a discussion on the matter; and Johnson said, bluntly: 'Automatic weapons are illegal. To me, that is part of that same type of process. So I have no problem banning those.'

Surprisingly, even the National Rifle Association (NRA) - which has vehemently fought gun control laws, and lobbies Congress heavily to loosen or maintain existing gun statutes - has called for a look into bump-stocks.

However, it didn't go as far as to demand a ban.

It said the ATF should 'immediately review whether these devices comply with federal law,' adding: 'The NRA believes that devices designed to allow semiautomatic rifles to function like fully-automatic rifles should be subject to additional regulations.'

But should the ATF modify federal statute to make such devices illegal, the move would circumvent Congress.

The concerns expressed by Republicans over bump-stocks echo those of Sen. Dianne Feinstein, D-Calif., who introduced legislation that would ban the sale and possession of bump stocks on Wednesday.

'In just nine minutes an individual was able to turn a concert venue into a battlefield,' Feinstein told reporters at a Capitol Hill press conference, flanked by Sen. Richard Blumenthal, D-Conn., whose home state was rattled in 2012 by the Sandy Hook mass shooting, and Sen. Bernie Sanders, I-Vt.

House Minority Leader Nancy Pelosi, D-Calif., agreed with that move, and said she thought there was enough bi-partisan momentum to make it happen. However, no GOP members actively supported Feinstein's bill on its announcement.

Sen. Dianne Feinstein, D-Calif., introduced legislation alongside her Democratic colleagues on Wednesday to ban the sale and possession of bump stocks. The Las Vegas killer had 12 such devices on the guns found in his hotel room

Also on Thursday, some gun sellers revealed that sales of bump-stocks had gone up since they were linked to the deaths or injuries of more than 500 victims.

'Oh, God, yes, it's been insane. Since this story has broke, we've been getting about 50 people a day asking for them,' Michael Cargill, owner of Central Texas Gun Works in Austin, Texas, told CNN Money.

He said his distributors had sold out of the modifications, too.

'Now that someone has come out saying maybe we should ban them, they're definitely going to sell off the shelf,' Cargill said.

'All the distributors are out because customers bought them all,' said Josh Dagnese, the owner of Village Gun Store in Whitefield, New Hampshire, who sold his last bump-stock on Tuesday.

'I am unable to reorder because of the demand,' he said.

And Slide Fire, which sells bump-stocks, told CNN: 'We have decided to temporarily suspend taking new orders in order to provide the best service with those already placed.'

Gun stores across the country are now reporting that they started selling out of bump-stocks as soon as the modifications were linked to the mass shooting, likely ahead of any possible ban or restrictions

In response to Paddock's killing spree, the New York Police Department is now training bell hops and other hotel staff how to spot rifle bags.

Paddock had snuck 23 rifles, dozens of magazines, and countless rounds of ammunition into his suite in the Mandalay Bay hotel over the course of several days.

He used 13 suitcases to bring in the weapons, but the NYPD is training hotel staff to tell the difference between rifle bags and golf bags.

They have not released how exactly they will train staff. Police are regularly in touch with hotels and public transit staff across the city.

'Everybody knows what a rifle looks like. But what does a gun case look like, as opposed to a golf bag or regular luggage? So we have added that in,' Deputy Police Commissioner John Miller told ABC.

Tourists who were asked about the strategy supported it on Wednesday but argued that the hotel staff deserved to be paid more if they were expected to act as the first defense against potential disaster.

There has also been a heightened police presence in tourist-heavy areas of New York in the days since the shooting.

Tourists who were asked about the strategy supported it on Wednesday but argued that the hotel staff deserved to be paid more if they were expected to act as the first defense against potential disaster.

The Mandalay Bay hotel has not commented on its security since the atrocity.

Police say they want bell hops to know the difference between a suitcase and a rifle bag or case (above)

Another view of a standard rifle carrier. Officers say it is important for hospitality staff to be able to identify them

TIMELINE OF TERROR IN VEGAS:

SUNDAY

Country music star Jason Aldean was performing on stage at the Route 91 Harvest Music Festival when lone gunman Stephen Paddock, 64, opened fire on the 22,000 people gathered.

10:05pm: First shots fired by the suspect. This was seen on closed-circuit television from the concert venue.

10:12pm: First two officers arrive on the 31st floor and announce the gunfire is coming from directly above them.

10:15pm: The last shots are fired from the suspect per bodycam footage.

10:17pm: The first two officers arrive on the 32nd floor.

10:18pm: Security officer tells the LVMPD officers he was shot and gives them the exact location of the suspect's room.

10:26-10:30pm: Eight additional officers arrived on the 32nd floor and began to move systematically down the hallway, clearing every room and looking for any injured people. They move this way because they no longer hear the gunfire of an active shooter situation.

10:55pm: Eight officers arrive in the stairwell at the opposite end of the hallway nearest to the suspect's room.

11:20pm: The first breach was set off and officers entered the room. They observed the suspect down on the ground and also saw a second door that could not be accessed from their position.

11:27pm: The second breach was set off allowing officers to access the second room. Officers quickly realized there was no one else in the rooms and announced over the radio that the suspect was down.

MONDAY

2.13am Monday: Investigators said that they are looking for the 'roommate' of the shooter - Marilou Danley - and describe her as a person of interest.

6.30am Monday: Investigators say they have located the suspect's girlfriend and say that she is overseas and is no longer a person of interest.

TUESDAY

2pm: Sheriff says Marilou Danley is a person of interest again, after report that Paddock wired $100,000 to an account in the Philippines a week before the attack, while she was in the country.

Tuesday night: Danley arrives back in the U.S. from the Philippines. She is wheeled off her flight at Los Angeles International Airport in a wheelchair.